Answer:
Solving two step inequalities
Solving Two Step Linear Inequalities. To solve a two-step inequality, undo the addition or subtraction first, using inverse operations , and then undo the multiplication or division. The inverse operation of addition is subtraction and vice versa.
I could go through and answer it all and give you the answer but i think this will be better. Scientific Notation is just a way to sum up a long number so you don't have to write out a bunch of zeros. Without talking about "significant figures" you just put a decimal point after the first actual number, add a "x 10" then count the zeros and write the number as a superscript to the 10. any number like this 0.000.... (<em>smaller than 1</em>) has a negative superscript. any number like 10000... (<em>larger than 1</em>) has a positive superscript.
Example:
6,200,000 = 6.2 x 10^6
&
0.0000062 = 6.2 x 10^-6
Here are some general rules now that you know what you are trying to do:
1. Scientific Notation ONLY ever has ONE number in front of the decimal, like this: 6.02 x 10^23.
NOT LIKE THIS: 60.2 x10^23 or 61.2 x 10^23
and NEVER a zero like this: 0.70 x 10^23.
2. it is ONLY ever a multiplication symbol, 6.02 "x" 10^23, NEVER divide, + or -.
3. for the examples on this paper, do NOT include zero's on the end like this 7.20 x 10^23. Only the actual numbers, and, <em>zeros that are</em> <em>between numbers</em> like this 6.0201 x 10^23. The zero's on the end get summed up and are noted in the ^23 part. (<em>This part is called a superscript, in case you didn't know that</em>)
4. In the last section they are just showing you some incorrect stuff to trick you up. Just put the decimal in the correct place and adjust the ^23 superscript bit.
Step-by-step explanation:
<em>H</em><em>o</em><em>p</em><em>e</em><em> </em><em>i</em><em>t</em><em> </em><em>i</em><em>s</em><em> </em><em>h</em><em>e</em><em>l</em><em>p</em><em>f</em><em>u</em><em>l</em><em>.</em>
<em>T</em><em>h</em><em>a</em><em>n</em><em>k</em><em> </em><em>y</em><em>o</em><em>u</em><em>.</em>
Answer:
r=31
Step-by-step explanation:
2r=62
r=31
Divide 4 on both sides, x=6.4/4 which is 1.6
